Hanafy, Yasser Adel, et al. “Using of Blue Green Algae Extract and Salicylic Acid to Mitigate Heat Stress on Roselle (Hibiscus Sabdariffa L.) Plant under Siwa Oasis Conditions: ”. Plant Science Today, vol. 9, no. 3, May 2022, doi:10.14719/pst.1593.